Definition: In this task, you are given an input list A. You need to extract and sort the unique digits used in the list in ascending order. Return -1 if there is no digit in the list.
Input: ['97', '29', '499', '455', 'f', '325', '355', '471', '431', 'n']

1, 2, 3, 4, 5, 7, 9